![]() ![]() ![]() Watering: Water is needed, but the amount and frequency varies with temperatures, day length, plant size and soil mix. Johnny’s Selected Seeds is one seed catalog that clearly labels greenhouse appropriate varieties. Some seed catalogs offer varieties of seeds that are appropriate for greenhouse production, often due to their method of pollination. Tomatoes and peppers are self-pollinating but the blossoms should be gently shaken or vibrated on a regular basis. Standard cucumbers will need hand pollination, taking the male blossom and gently rubbing the female blossom center. Pollination: Pollination can be an issue for greenhouse vegetable gardening. Peppers, tomatoes, and cucumbers need warmer temperatures at night, around 65☏, especially when fruit is growing. A cool greenhouse, with night time temperatures of 40-45☏, works for lettuce, spinach and radishes. However, what you are actually able to successfully grow depends on the night time temperatures you decide to keep. Vegetables to grow in the winter greenhouse: Vegetables best for greenhouse vegetable gardening in the winter include lettuce, spinach, radishes, tomatoes, peppers, and cucumbers. High output fluorescent lamps are energy efficient as well. However, the new High Output Fluorescent lamps, High Pressure Sodium or Metal Halide lights provide strong, full spectrum light and can often cover a larger area than ordinary fluorescent. A fluorescent shop light hung about 4 inches above your plants may be enough. If the natural light in your greenhouse is low (a common issue in winter), supplemental lighting helps keep plants from getting spindly. Lighting: Light is key to successful greenhouse vegetable gardening. Less common methods include in-the-floor radiant heating or an extension of a forced-air home heating system to an attached greenhouse. Natural gas and LP heaters should be properly vented, providing fresh air for combustion and exhausting fumes, and equipped with a good thermostat. ![]() 240 volt heaters are generally more efficient than 120 volt, but a 120 volt heater is generally adequate for heating a small greenhouse when controlled by a separate heavy-duty thermostat. Heating: Heat for greenhouse vegetable gardening can be provided with electric, natural gas or LP gas heaters. Seeds can also be planted directly into a soil bench warmed by a soil cable. Propagation mats under seed flats helps germination by warming the soil. You need containers, soil, fertilizer, water, and in cool, northern areas, heat and light. Greenhouse vegetable gardening gives an early start to your garden. Starting seeds: Seed starting for a vegetable garden is a common use for a greenhouse. Creating a successful backyard greenhouse for vegetables begins with a few essential items. Successful greenhouse vegetable gardening requires the right environment, taking into consideration heat (in cooler months), cooling (in warm months), ventilation, air circulation, shading, humidity and lighting. ![]() A greenhouse is a great asset when growing vegetables in your garden, extending your growing season and even providing you with fresh vegetables through the winter and early spring. Standard Sturdi-Built Greenhouse FeaturesĬan you grow vegetables in a garden? Sturdi-Built builds greenhouses for vegetable gardening to make your gardening season longer and more seamless. ![]()
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